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The quantile regression approach to efficiency measurement: insights from Monte Carlo simulations

Chunping Liu, Audrey Laporte and Brian Ferguson
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Chunping Liu: Department of Economics, University of Guelph, Guelph, Ont., Canada, Postal: Department of Economics, University of Guelph, Guelph, Ont., Canada

Health Economics, 2008, vol. 17, issue 9, 1073-1087

Abstract: In the health economics literature there is an ongoing debate over approaches used to estimate the efficiency of health systems at various levels, from the level of the individual hospital - or nursing home - up to that of the health system as a whole. The two most widely used approaches to evaluating the efficiency with which various units deliver care are non-parametric data envelopment analysis (DEA) and parametric stochastic frontier analysis (SFA). Productivity researchers tend to have very strong preferences over which methodology to use for efficiency estimation. In this paper, we use Monte Carlo simulation to compare the performance of DEA and SFA in terms of their ability to accurately estimate efficiency. We also evaluate quantile regression as a potential alternative approach. A Cobb-Douglas production function, random error terms and a technical inefficiency term with different distributions are used to calculate the observed output. The results, based on these experiments, suggest that neither DEA nor SFA can be regarded as clearly dominant, and that, depending on the quantile estimated, the quantile regression approach may be a useful addition to the armamentarium of methods for estimating technical efficiency. Copyright © 2008 John Wiley & Sons, Ltd.

Date: 2008
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Working Paper: The Quantile Regression Approach to Efficiency Measurement: Insights from Monte Carlo Simulations (2007) Downloads
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